docs: def accept_format(*, version: str = "v3", media: Optional[str] = None,
                    json: bool = True) -> str:
      """Construct the specification of the format that a request should return.
  
      The version argument defaults to v3 of the GitHub API and is applicable to
      all requests. The media argument along with 'json' specifies what format
      the request should return, e.g. requesting the rendered HTML of a comment.
      Do note that not all of GitHub's API supports alternative formats.
  
      The default arguments of this function will always return the latest stable
      version of the GitHub API in the default format that this library is
      designed to support.
      """
      # https://developer.github.com/v3/media/
      # https://developer.github.com/v3/#current-version
      accept = f"application/vnd.github.{version}"
      if media is not None:
          accept += f".{media}"
      if json:
          accept += "+json"
      return accept